This Pentabrid DVR recorder, also called XVR, is the best the security industry has to offer at this time for a small form factor. It is a 5MP HDCVI DVR with capability of accepting up to a total of 24 cameras (16 BNC Cameras up to 5MP + 8 IP Cameras up to 6MP). If you are looking to upgrade your existing security camera system or building a new system but want to mix and match HD security cameras, and IP cameras, then this DVR is a perfect choice. It allows use of 5 different types of security camera technologies:
Analog Security cameras up to 960H resolution
HD security cameras over Coax up to 5MP
IP Cameras up to 6MP  
16 Channel XVR
Supports up to 5MP HD cameras
Records HDCVI, TVI, AHD, CVBS
Records Analog Security Cameras
Records 8 IP Cameras
1 RCA Audio Input
Up to 20TB
HDMI/VGA Video Output